paul ryan, taking away from his own debate prep. >> last night, america got to see the man i know. a leader. >> reporter: the president, meanwhile, in the battleground leaning his way, wisconsin. speaking before a crowd of more than 30,000, his biggest crowd of the campaign yet. more energized than during the debate. >> when i got on the stage, i met this very spirited fellow who claimed to be mitt romney. but i know it couldn't have been mitt romney because the real mitt romney's been running around the country for the last year, promising $5 trillion in tax cuts that favor the wealthy. >> reporter: many supporters asking, why wasn't the president tougher? why no mention of romney and his comments about the 47%? the people romney said he could never convince to take personal responsibility. romney offering new explanation for those comments overnight. >> why didn't president obama bring that up? what would you have said if he did bring it up? >> clearly, in a campaign with hundreds, if not thousands of speeches, and question and answer sessions, you're going to say something that